Here is the full list of all 30 Slain: Back from Hell achievements.
Reached the top of the Blood Tower without falling in any gore pits.
Finish the Bloodgrounds without dying at all.
Defeat the game without using any Mana.
Defeat the game without losing a single life.
Complete the Wolf Run without losing any health.
Kill Vroll without taking any damage.
Destroy Vroll and liberate Chalh within 3 minutes.
Headbang after every single boss has been defeated.
Find all five pieces of the Talisman.
Defeat Hogre without losing any health.
Defeat Malikesh without losing any health.
Defeat the Ice Beast without losing any health.
Hit 6 Ice Meteors back at the Ice Beast.
Defeat the Mother Beholder without losing any health.
Dispatch the Mother Beholder within 30 seconds.
Destroy 30 enemies with reflected projectiles.
Complete Highlands level without killing an enemy with the flame blade.
Escape the Highlands Caves through the secret passage.
Defeat the Banshee Queen without losing any health.
Slay 8 of your enemies in a trice.
Successfully execute 100 Critical Strikes.
Watch 30 enemies get killed by traps.
Defeat Lupus Rex without losing any health.
You Have Been Killed 100 times. Rejoice!
Squash a Wolf Guard in a crusher trap.
Defeat the Fire Hounds without losing any health.
Defeat the Thorn Beast without losing any health.
Die for the very first time.
Kill every Beholder in the Hive without using mana.
Successfully avoid the first spike trap in the Bloodgrounds.